These mysterious ruins are hidden amid this sleepy coastal city.

A swamp that was the site of prehistoric water burials also managed to preserve its corpses for millennia.

This abandoned NASA launch site is now a memorial to a trio of astronauts who were killed there.

The former home of the army detachment that captured Geronimo.

One of the American Southwest's most extensive collections of Navajo rock art.

Try not to get slimed in Tribeca.

This sculpture by artist Fritz Keonig survived the 9/11 attacks and now stands as a monument to the victims.

A celebration of capitalism in Midtown.

This massive Maya archaeological site is home to the tallest man-made structure in Belize.

A devastated ruin in the south of Belize where British explorers claimed to unearth the Mitchell-Hedges Crystal Skull.

These enigmatic ruins continue to vex archaeologists.

An important Mayan religious and trading center dating back to 200 BC.

A massive underwater sinkhole made famous by Jacques Cousteau.

A familiar otherworldly creature guards this 12th-century Scottish abbey.

The sci-fi villain is a little-known inhabitant of the U.S. capital's largest cathedral.

A real (but thankfully not live) missile stands tall as a monument to the United States military in the small town of Cordele.

A popular oddity on display in a stately building, offering a symbolic commentary.

Two Civil War-era cemeteries stuck between runways at the world's busiest airport.

Civil War soldiers, captains of industry, and paupers all interred on historic grounds.

The largest cemetery in the American Southeast is a hidden gem near the heart of Atlanta.

Next to the Leaning Tower of Pisa is a cemetery home to ancient sarcophagi and disturbing murals.

The Pope’s secret escape route.

A detailed pachyderm supports Rome's smallest Egyptian obelisk.

The once forbidden "secret cabinet" of erotic art from excavations of Pompeii and Herculaneum.